jim avila has been tracking the latest in washington. good morning. >> reporter: good morning, amy. the loss of this homegrown superstar, beloved on both sides of the border, is under investigation by u.s. and mexican officials. under scrutiny, the maintenance of the plane and the medical record of a pilot in his late 70s. mexican-american superstar jenni rivera may be lost. her twin-engine lear jet, spread over a 1,000-foot debris field. but overnight, her family refused to give up on a miracle. >> we have no confirmation of her body being recovered. we are strong. and we'll continue to stay strong. >> reporter: still, the news from investigators is not encouraging. reports of a rapid lost of altitu altitude, just outside monterrey, mexico, where the mexican-american superstar had performed the night before the crash. now, we're learning that the small twin-engine lear jet was old. it was a 43-year-old jet. and one of the two pilots was 78. both of those factors will be investigated by mexican authorities, aided by the american national transportation safety board. >> there's no ag